mod_jk + CPU load

[Luis Torres <A0...@itesm.mx>]

Hello everyone,

I'm using Apache 2.043 + mod_jk 1.2.6 + Tomcat 4.03 (x2) + JDK 1.4.0 on 
Solaris 9

As load increases one of the tomcat instances takes up about 35% of CPU 
while the apache process takes another 30%. Tomcat Standalone didnt 
present this problem and it stayed always at 5% maximum. When load 
decreases the CPU usage is still there and doesnt go away until I 
restart apache.

If i look into mod_jk.log I can see about 10 errors per hour like the 
following:
[Thu Jul 14 20:50:22 2005]  [jk_ajp_common.c (1146)]: ERROR sending data 
to client. Connection aborted or network problems
[Thu Jul 14 20:50:22 2005]  [jk_ajp_common.c (1462)]: ERROR: Client 
connection aborted or network problems

My setup is exactly the same as described in the guide by Pascal Forget: 
http://raibledesigns.com/tomcat/

I had to go back to tomcat standalone because after about 3 hours of 
being in that state tomcat just stops servicing requests, but I would 
like to find the cause of it.

The closest thing related to this is this bug in apache which wasn't 
after all:
http://issues.apache.org/bugzilla/show_bug.cgi?id=27757

Hope someone can shed some light on this.

Luis


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